chore(android): Update default value for androidxCoreVersion (#7750)

Author: jcesarmobile

android/capacitor/build.gradle

@@ -2,7 +2,7 @@ ext {
     androidxActivityVersion = project.hasProperty('androidxActivityVersion') ? rootProject.ext.androidxActivityVersion : '1.9.2'
     androidxAppCompatVersion = project.hasProperty('androidxAppCompatVersion') ? rootProject.ext.androidxAppCompatVersion : '1.7.0'
     androidxCoordinatorLayoutVersion = project.hasProperty('androidxCoordinatorLayoutVersion') ? rootProject.ext.androidxCoordinatorLayoutVersion : '1.2.0'
-    androidxCoreVersion = project.hasProperty('androidxCoreVersion') ? rootProject.ext.androidxCoreVersion : '1.13.1'
+    androidxCoreVersion = project.hasProperty('androidxCoreVersion') ? rootProject.ext.androidxCoreVersion : '1.15.0'
     androidxFragmentVersion = project.hasProperty('androidxFragmentVersion') ? rootProject.ext.androidxFragmentVersion : '1.8.4'
     androidxWebkitVersion = project.hasProperty('androidxWebkitVersion') ? rootProject.ext.androidxWebkitVersion : '1.12.1'
     junitVersion = project.hasProperty('junitVersion') ? rootProject.ext.junitVersion : '4.13.2'